z, DUAL-CH, LCD BIAS POWER SUPPLY

MP5610 Rev. 1.02

www.MonolithicPower.com

12

12/6/2016

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Output Over-Voltage Protection

MP5610 provides over-voltage protection for

step-up converter. If the positive output voltage

is larger than 6.1V, IC stops switching and

output starts dropping. When the voltage drops

lower than OVP recover threshold, IC resumes

to normal switching. The hysteresis is 215mV.

Since the negative output voltage is always

tracking

the

positive

output

voltage,

the

negative output voltage can also be avoided to

over-charging. In some unexpected cases, if

the negative output voltage is lower than -6.2V,

IC stops switching and output starts dropping.

When the voltage drops larger than OVP

recover

threshold,

IC

resumes

to

normal

switching. The hysteresis is 165mV.

After startup, if the output feedback voltage is

latches off to avoid any damage. This fault has

to be cleared by reset the input power or enable

startup, larger current draws from the input

power side and it can be limited by maximum

input DC current limit, around 260mA.

by sensing the negative output voltage. After

the IC will stop switching and latch off to avoid

before startup, the positive output voltage will

not be charged up and thus, the IC will be

protected by limiting the input current limit

switch.

Input UVLO Protection

To avoid IC operation in low input voltage,

MP5610 has input UVLO protection. IC only

starts operation when input voltage is larger

than

input

under-voltage-lock-out

protection

threshold,

There

is

a

260mV

hysteresis when input voltage drops.

Over Heat Protection

When MP5610 junction temperature exceeds

the thermal protection threshold, IC shuts down

and latch off.